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Geographic Areas (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Property and equipment, net $ 340.9   $ 310.6
Revenue 385.6 $ 316.3  
United States      
Segment Reporting Information [Line Items]      
Property and equipment, net 324.9   293.6
Revenue 197.1 161.6  
International      
Segment Reporting Information [Line Items]      
Property and equipment, net 16.0   $ 17.0
Revenue $ 188.5 $ 154.7